Assertion: comfrey's leaf | /r/CapableOf | clasp the stem
Facets:
Source sentences:
text: Basal and the lowest stem leaves are largest and stalked, becoming smaller as they ascend the stem; the middle and upper leaves are stalkless and clasp the stem.
text: It is easily identified by the sparsely flowered, coiling clusters at the tip of the stem, densely hairy stem, upper leaves clasping the stem, and bristly fruits.